In a support document posted yesterday Apple has seemingly given a warning to Palm who recently released its Pre handset while touting one of the leading features as its ability to sync with Apple’s iTunes software.

It was reported at the time that the Palm Pre emulates an iPod therefore tricking iTunes into syncing with the device, in Apple’s support note titled “About unsupported third-party digital media players” the company warns that future updates to iTunes could break such features.

Apple designs the hardware and software to provide seamless integration of the iPhone and iPod with iTunes, the iTunes Store, and tens of thousands of apps on the App Store. Apple is aware that some third-parties claim that their digital media players are able to sync with Apple software. However, Apple does not provide support for, or test for compatibility with, non-Apple digital media players and, because software changes over time, newer versions of Apple’s iTunes software may no longer provide syncing functionality with non-Apple digital media players.